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Photonics Research 2024年第5期12卷 1078-1092页

作者： RODRIGO MARTIN-HERNANDEZ LORENZ GRUNEWALD luis sanchez-tejerina luis PLAJA ENRIQUECONEJERO JARQUE CARLOS HERNANDEZ-GARCIA SEBASTIAN MAI Grupo de Investigacion en Aplicaciones del Laser y Fotonica Departamento de Fisica AplicadaUniversidad de SalamancaE-37008 SalamancaSpain Unidad de Excelencia en Luz y Materia Estructuradas(LUMES) Universidad de SalamancaE-37008 SalamancaSpain Institute of Theoretical Chemistry Faculty of ChemistryUniversity of Vienna1090 ViennaAustria Vienna Doctoral School in Chemistry(DoSChem) Faculty of ChemistryUniversity of Vienna1090 ViennaAustria Departamento de Electricidad y Electrónica Universidad de Valladolid47011 ValladolidSpain

*** *** thank Valentina Shumakova,Elizaveta Gangrskaia,Alessandra Bellissimo,Audrius Pugzlys,and Andrius Baltu?ka for fruitful discussions and computational support by the Vienna Scientific Cluster(VSC 4).The authors thankfully acknowledge the computer resources at MareNostrum and SCAYLE,and the technical support provided by Barcelona Supercomputing Center(RES-FI-2022-3-0041).R.M.-H.,L.S.-T.,L.P.,E.C.J.,and C.H.-*** funding from the European Research Council(ERC)under the European Union’s Horizon 2020 research and innovation program(Grant Agreement No.851201)and support from Ministerio de Ciencia e Innovación(PID2022-142340NB-I00,PID2019-106910GB-I00).This research was funded in whole or in part by the Austrian Science Fund(FWF)(10.55776/ZK91).For open access purposes,the author has applied a CC BY public copyright license to any author accepted manuscript version arising from this submission.

关键词： metallic polarized discussions

Machine Learning-Based Radio Access Technology Selection in the Internet of Moving Things

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China Communications 2021年第7期18卷 13-24页

作者： Ramon sanchez-Iborra luis Bernal-Escobedo Jose Santa Dept.Engineering and Applied Techniques University Centre of Defence at the Spanish Air Force Academy30729 San JavierSpain Dept.Information and Communication Engineering University of Murcia30100 MurciaSpain Dept.of Electronics Computing Technology and ProjectsTechnical University of Cartagena30202 CartagenaSpain

The Internet of Moving Things(IoMT)takes a step further with respect to traditional static IoT *** this line,the integration of new eco-friendly mobility devices such as scooters or bicycles within the Cooperative-Intelligent Transportation Systems(C-ITS)and smart city ecosystems is crucial to provide novel *** this end,a range of communication technologies is available,such as cellular,vehicular WiFi or Low-Power Wide-Area Network(LPWAN);however,none of them can fully cover energy consumption and Quality of Service(QoS)***,we propose a Decision Support System(DSS),based on supervised Machine Learning(ML)classification,for selecting the most adequate transmission interface to send a certain message in a multi-Radio Access Technology(RAT)set *** ML algorithms have been explored taking into account computing and energy constraints of IoMT enddevices and traffic ***,a real implementation of a decision tree-based DSS for micro-controller units is presented and *** attained results demonstrate the validity of the proposal,saving energy in communication tasks as well as satisfying QoS requirements of certain urgent *** footprint of the real implementation on an Arduino Uno is 444 bytes and it can be executed in around 50µs.

关键词： internet of moving things multi-RAT CITS classification personal mobility

Black holes in asymptotic safety with higher derivatives:accretion and stability analysis

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Chinese Physics C 2021年第7期45卷 293-304页

作者： Fabian H.Zuluaga luis A.sanchez Escuela de Fisica Universidad Nacional de ColombiaA.A.3840MedellinColombia

We review steady spherically symmetric accretion onto a renormalization group improved Schwarzschild space-time,which is a solution to an asymptotically safe theory(AS)containing high-derivative *** use a Hamiltonian dynamical system approach for the analysis of the accretion of four types of isothermal test fluids:ultra-stiff fluid,ultra-relativistic fluid,radiation fluid,and sub-relativistic *** important outcome of our study is that,contrary to the claim in a recent work,there are physical solutions for the accretion of an ultra-relativistic fluid in AS,which include subsonic,supersonic,and transonic ***,we study quantum corrections to the known stability of the accretion in general relativity(GR).To this end,we use a perturbative procedure based on the continuity equation with the mass accretion rate being the perturbed *** classes of perturbations are studied:standing and traveling *** find that quantum gravity effects either enhance or diminish the stability of the accretion depending on the type of test fluid and the radial distance to the central object.

关键词： asymptotic safety black holes accretion stability

The political economy of city diplomacy

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Economic and Political Studies 2022年第2期10卷 228-249页

作者： Juan luis Manfredi-sanchez Department of International Studies&Journalism University of Castilla-La ManchaToledoSpain

City diplomacy is a major trend in the soft power *** cities face daily political issues deriving from globalisation(such as mass tourism,migration,climate change,and commodifi-cation of culture),they demand for,rather than contesting with a nationstate,an operational reinterpretation of sovereignty ori-ented to solve *** economy approach is a useful method to understand the role of global cities where the nation state has many *** global city establishes rules to influence international legal development and practice,even with-out a traditional legal basis(such as sovereignty,monopoly on violence,and legal exclusivity).As these‘superstar cities’grow,other cities are losing opportunities to develop and take advan-tage of *** risk of inter-urban inequality feeds *** will become the middle power in global political organisations in the future,and political economy will shed light on how power and values operate at the urban level.

关键词： City diplomacy leadership political economy sanctuary city urban agenda

TinyML-Based Fall Detection for Connected Personal Mobility Vehicles

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Computers, Materials & Continua 2022年第5期71卷 3869-3885页

作者： Ramon sanchez-Iborra luis Bernal-Escobedo Jose Santa Antonio Skarmeta University Center of Defense General Air Force AcademySan Javier30720Spain University of Murcia Murcia30100Spain Technical University of Cartagena Cartagena30202Spain

A new wave of electric vehicles for personal mobility is currently crowding public *** offer a sustainable and efficient way of getting around in urban environments,however,these devices bring additional safety issues,including serious accidents for ***,taking advantage of a connected personal mobility vehicle,we present a novel on-device Machine Learning(ML)-based fall detection system that analyzes data captured from a range of sensors integrated on an on-board unit(OBU)*** the typical processing limitations of these elements,we exploit the potential of the TinyML paradigm,which enables embedding powerful ML algorithms in constrained *** have generated and publicly released a large dataset,including real riding measurements and realistically simulated falling events,which has been employed to produce different TinyML *** attained results show the good operation of the system to detect falls efficiently using embedded *** considered algorithms have been successfully tested on mass-market low-power units,implying reduced energy consumption,flash footprints and running times,enabling new possibilities for this kind of vehicles.

关键词： Personal mobility machine learning on-board unit C-ITS IoT

A Regulatory Module Controlling CA-Mediated Endosperm Cell Expansion Is Critical for Seed Germination in Arabidopsis

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Molecular Plant 2019年第1期12卷 71-85页

作者： Rocio sanchez-Montesino Laura Bouza-Morcillo Julietta Marquez Melania Ghita Salva Duran-Nebreda luis Gomez Michael J.Holdsworth George Bassel luis Onate-sanchez Centro de Biotecnologia y Genomica de Plantas Universidad Politecnica de Madrid-lnstituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria Campus de MontegancedoPozuelo de AlarconMaddd 28223Spain School of Biosciences University of NottinghamLoughborough LE12 5RDUK School of Biosciences University of BirminghamBirmingham B15 23-rUK Departamento de Sistemas y Recursos Naturales E.T.S.I.MontesForestal y del Medio NaturalCampus de Moncloa28040 MadridSpain

A key component of seed germination is the interplay of mechanical forces governing embryo growth and the surrounding restraining endosperm *** cell separation is therefore thought to play a critical role in the control of this developmental *** we demonstrate that in Arabidopsis thaliana seeds,endosperm cell expansion is a key component of *** cells expand to accommodate embryo growth prior to *** show that this is an actively regulated process supported by spatiotemporal control of the cell expansion gene EXPANSIN 2 (EXPA2).The NAC transcription factors NAC25 and NACIL were identified as upstream regulators of EXPA2 expression,gibbereliinmediated endosperm expansion,and seed *** DELLA protein RGL2 repressed activation of the EXPA2 promoter by NAC25/*** together,our findings uncover a key role of the GA/ DELLA-NAC25/NACIL-EXPA2 network in regulating endosperm cell expansion to control the seed-toseedling transition.

关键词： cell expansion cell-wall remodeling enzymes endosperm expansin NAC transcription factors seed germination

On the simulation of shared autonomous micro-mobility

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Communications in Transportation Research 2022年第1期2卷 104-115页

作者： Naroa Coretti sanchez Inigo Martinez luis Alonso Pastor Kent Larson MIT Media Lab CambridgeMAUSA University of Navarra San SebastianSpain

Fast urbanization and climate change require innovative systems for an efficient movement of people and goods in *** trends towards vehicle-sharing,autonomous vehicles,and the use of micro-mobility systems gain strength,the intersection of these fields appears as an area of great *** could potentially bring the convenience of on-demand mobility into already prevalent shared micro-mobility systems(SMMS),increasing their efficiency and incentivizing more people to use active mobility *** novelty of introducing autonomous driving technology into SMMS and their inherent complexity requires tools to assess and quantify the potential impact of autonomy on fleet performance and user *** paper presents an ad-hoc agentbased simulator for the assessment of the fleet behavior of autonomous SMMS in realistic scenarios,including a rebalancing system based on demand *** also allows comparing its performance to station-based and dockless *** proposed simulation framework is highly configurable and flexible and works with high resolution and precision geospatial *** results of studies carried out with this simulation tool could provide valuable insights for many stakeholders,including vehicle design engineers,fleet operators,city planners,and governments.

关键词： Future mobility Autonomous vehicles Micro-mobility Agent-basedsimulation Multi-agentsystems

On the performance of shared autonomous bicycles:A simulation study

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Communications in Transportation Research 2022年第1期2卷 116-151页

作者： Naroa Coretti sanchez Inigo Martinez luis Alonso Pastor Kent Larson MIT Media Lab CambridgeMAUSA University of Navarra San SebastianSpain

As society faces global challenges such as population growth and climate change,rethinking cities is now more imperative than *** design of cities can not be abstracted from the design of their mobility ***,efficient solutions must be found to transport people and goods throughout the city efficiently and *** autonomous bicycle-sharing system would combine the most relevant benefits of vehicle-sharing,autonomy,and micro-mobility,increasing the efficiency and convenience of bicycle-sharing systems and incentivizing more people to bike and enjoy their cities in an environmentally friendly *** to the novelty of introducing autonomous driving technology into bicycle-sharing systems and their inherent complexity,there is a need to quantify the potential impact of autonomy on fleet performance and user *** paper presents the results of an agent-based simulation that provides an in-depth understanding of the fleet behavior of autonomous bicycle-sharing systems in realistic scenarios,including a rebalancing system based on demand *** addition,this work describes the impact of different parameters on system efficiency and service ***,it quantifies the extent to which an autonomous system would outperform current station-based and dockless bicycle-sharing *** obtained results show that with a fleet size three and a half times smaller than a station-based system and eight times smaller than a dockless system,an autonomous system can improve overall performance and user experience even with no rebalancing.

关键词： Future mobility Bicycle-sharing systems Autonomous vehicles Micro-mobility Agent-based simulation Multi-agent systems

Comments on "Non-existence of Shilnikov chaos in continuous-time systems"

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Applied Mathematics and Mechanics(English Edition) 2013年第9期34卷 1175-1176页

作者： A.ALGABA F.FERNANDEZ-sanchez M.MERINO A.J.RODRIGUEZ-luis Departamento de Matematicas Centro de Investigacion de Fisica Teorica y Matematica FIMATUniversity of Huelva Departamento de Matematica Aplicada II E.S.IngenierosUniversity of Sevilla Camino de los Descubrimientos s/n

A paper, ＂Non-existence of Shilnikov chaos in continuous-time systems＂ was published in the journal Applied Mathematics and Mechanics （English Edition）. The authors gave sufficient conditions for the non-existence of homoclinic and heteroclinic orbits in an nth-order autonomous system. Unfortunately, we show in this comment that the proof presented is erroneous and the result is invalid. We also provide two counterexamples of the wrong criterion stated by the authors.

关键词： homoclinic chaos heteroclinic chaos non-existence of Shilnikov chaos

Dissecting Maize Productivity:Ideotypes Associated with Grain Yield under Drought Stress and Well-watered Conditions

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Journal of Integrative Plant Biology 2012年第12期54卷 1007-1020页

作者： Jill E.Cairns Ciro sanchez Mateo Vargas Raziel Ordoez Jose luis Araus Global Maize Program International Maize and Wheat Improvement Center(CIMMYT)Mexico D.F.Mexico Bioinformatics and Statistics Unit International Maize and Wheat Improvement Center(CIMMYT)Mexico D.F.Mexico Unit of Plant Physiology Department of Plant BiologyUniversity of BarcelonaBarcelonaSpain

To increase maize （Zea mays L.） yields in drought-prone environments and offset predicted maize yield losses under future climates, the development of improved breeding pipelines using a multi-disciplinary approach is essential. Elucidating key growth processes will provide opportunities to improve drought breeding progress through the identification of key phenotypic traits, ideotypes, and donors. In this study, we tested a large set of tropical and subtropical maize inbreds and single cross hybrids under reproductive stage drought stress and well-watered conditions. Patterns of biomass production, senescence, and plant water status were measured throughout the crop cycle. Under drought stress, early biomass production prior to anthesis was important for inbred yield, while delayed senescence was important for hybrid yield. Under well-watered conditions, the ability to maintain a high biomass throughout the growing cycle was crucial for inbred yield, while a stay-green pattern was important for hybrid yield. While new quantitative phenotyping tools such as spectral reflectance （Normalized Difference Vegetation Index, NDVI） allowed for the characterization of growth and senescence patterns as well as yield, qualitative measurements of canopy senescence were also found to be associated with grain yield.

关键词： Climate change drought stress ideotypes maize senescence spectral reflectance.